Vane-ring for turbines.



l B. LJUNGSTRM. VANB RING' FOB TURBINES.

APPLvloA'rIon num mais; 1am. K

` Patented Aug3o,1910.

BERGER iwNesTRM, F STOCKHOLM,

SWEDEN, AssIGNoR To' AKTIEBOLAGET LJUNGSTROMS AUGTURBIIL' 0F STOCKHOLM; SWEDEN.

f VANE-RING rea' TURBINES.

Specication of Letters Patent.

Patented aug. 30, 191e.

Application filed February 1S, 1910. Serial No. 544.872.

To alize/mm 'it 'may concern:

engineer. a citizen of Sweden. residing at:

(rvtmagnigatan 18, Stockholm, Sweden, hare invented new and useful lniprovvinents in Yane-llings for (as or Steam Turbines, of which the following is a spvvitication.

My present invention' relates to the vanv- `rings for gas or .steam turbines to be attavhvd to a stationar or rotating part of the turbine. lts object 1s to provide. a simple. vtlivivnt. :xml cheap Vane that will v not j fvt hot as soon as the vane rings now in use.

ln thv-avvompartyingdrawings: Figure 1 represents a \'vrtival section View on the line -l5 ot' Fig. I. of one side of thv device embodying my invention before thv welding pria-ess: l-`i;` l" represents a vertiral svction t'irw 'fn thv iin'v .\-l ot Fig. Si 'if the right hand `idv ot a moziitivd forni oi' the inw atti-r thv wvldiiig' prof-ess; Fig. 2 lvprvsvnts a rvrtival .-vvtional \'ivw on thv line l of l"i; i ol a moditivd form of a .'anv ring vnihodying my invention. showing Y on thv right thv rml;rv after thv welding:

prot-v and on thv left. before thv wvldin; r naivvss; Fig'. 2. a View m side elevation of l r svvtion'al \'iv\\' of another form, in which the .special rvint'orvin;- ring f/ is used and the mvan` ot' altar-hingr the rinfs'to thv supportin.;r ring is shown. and lig. a vertical sectional rivw of thc vane rinkr for an axial turbine.

1/ designates thv. rings for reveiring the ram-s. v

f' designates the Yanes, the ends of which vxtvnd into vhannvls or grooves of .sa'id \:1nvrinjs n and are welded by any suitable :nvans thvrvin. the channels l1, preferablyl heing tilted or nearly tillvd with mvtal in the 'opvrat ion.

ln my prvt'vrrvd form (shown in lvft hand ot' Fig. l.) vavh ot' thv rane-rings r/ is separated from its support by mvans of a thin rin; r or strip /i intvgral with and voilou-tin.; lsaid support and ring r 1l. 'l`his stlip /i is :f'orlnvd h v vullingA out thv metal at L'. rl`hisl allows thv heat to radiate from this thin st rip and to pass oli' without heating to any vxtvnt thv support and provides fora low lvmpvratnreand :l quick coolingof thedeviee. This vnnnvvtion /1 hvtwvvn' thv vanv rin-,1 n and support f' may huwen-r hv of .svvvral p arts as shown at theright of Fig. 1.k 'l`he 4 rm;` fr and ring or lstrip /i are integral in that form, the ring /1 being provided with an :annular side extension on its inner edge and :damped between the two members of the t support z'.

In the weldingroperation before mentioned the vhannels l; are completely or partially tilleul with nivtal, whivh, welding with the channels and the Yanes, makes a permanent f-t'mnvvtion and at thv same time thickens thv nivtal at that point, thereby greatly strengthfixing the rings. lf desired. howevvr, sllpporting rings may also be added as'y/ in lig. t lo add greater strength or the rings n may he made thinner and the supporting rings f/ added in place of a heavy filling in of the rha'invls b.

In Figs. 2 :1nd.3 a portion e of the Yanes extends alittle beyond the side of the ring and tilts np the channels in thewvlding proeess without. the addition el other metal, solder, &e. Of course any suitable process of welding?r may be employed, the only object'. i being' to fasten them together the. same as if they were one integral piece of metal and to i till or nearly ffill the channels b, thereby .greatly strengthening the device. The object in havinzgrv the channels b being te resinee the thickness of the metal at this point tu facilitate the punehingr of the slots through which the 'zines are to he inserted. After thisv has been accomplished and the Yanes inserted it isdesirable to thicken the rings at. thr-a point to add Strength thatI they may withstand the strain put upon them and thus increase their length of life or dura liiity. f

In the forni shown in Fig. 4 the rings a :are of thinner construetion than that .shown in the other views and are provided with the supporting ring gf to which the are secured by means of the deve-tail Joint f er any other suitable manner.

The rings may of coarse be integral or of iwo or more parts pressed togetheror nttached to each other by any suitable means, the integral forni how-.ver being the preferred forni.

Having thus dvseriimd my in\ ention, what; I claim as new and desire to .secure by Letters PatentJ is:

l. A vane structure comprising vanvs, two rings for receiving the ends of .aid vanos, l said rings proridvd with vhannvls which are i i i siotted for the insertion of said venes and secured to said venes b.h welding, in combinat1on.w1th supports or said rings and n.

thin strip, integral with,r and connecting'V sai rings bein provided with channels which are slotte to receive the ends of seid venes, said rings nd venes being iieided to; gether. v

5. A vane Ystructure comprising v'zines .rings for receiving the ends of sind venes.

H nnwio MELINDER, HARRY Anmut.

5' each ringf'and its support. sal rings and venes being-.welded together, 25 2. A vane structure comprisin venes, two 1n Combination with supporting rings and rings` receiving the ends of sai venes and means for securing said rlngs thereto. `being suitably securedv thereto, Vin combina- 6. A vanev structure comprising venes,

tion with supports for said rings and thin rings receiving the ends of seid.V venes, said 10 stri s, integral with said rings, connecting venes and rings being suitably lSecured. t0 30 sai supports and rings.- i if each other,` in combination with a supporti 3. 'A vane 'structure comprising vanos, .ing ring, said rings and supporting ringA bei rings receiving the ends of said vanes and ing connected by means of dovetaii joints.

being suitably secured thereto, in eombina- In testiniony vs 'hereof 1 have signed my y 'l1 f 15 tion with supports. for said rings and thin name to this specitication 1n the presence of 35 3 strips connecting said rings and supports. two subscribing Witnesses. .Y

4. A vane structure comprisingvanes, and BIRGER LJUNGSTROM. rrinesior receiving the ends of said venes, g Witnesses: Y 

